December weather forecast
Demuth, CA

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Weather in December

December, the first month of the winter in Demuth, is still a chilly month, with an average temperature fluctuating between 27.9°F (-2.3°C) and 43.3°F (6.3°C).

Temperature

December, known for its average high temperature of 43.3°F (6.3°C) and an average low temperature of 27.9°F (-2.3°C), is the coldest month.

Humidity

The average relative humidity in December is 76%.

Rainfall

In Demuth, during December, the rain falls for 12.5 days and regularly aggregates up to 4.21" (107mm) of precipitation. In Demuth, during the entire year, the rain falls for 105 days and collects up to 24.69" (627mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In December, it is snowing for 7.5 days. Throughout December, 8.11" (206mm) of snow is accumulated. Throughout the year, there are 36.7 snowfall days, and 43.62" (1108mm) of snow is accumulated.

Daylight

With an average of 9h and 12min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:12 am and sunset at 4:36 pm. On the last day of December, in Demuth, sunrise is at 7:30 am and sunset at 4:45 pm PST.

Sunshine

With an average of 5.7h of sunshine, December has the least sunshine of the year.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: A maximum daily UV index of 2 during December morphs into the following directions:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
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Frequently asked questions

What time of the year is the coldest in Demuth?

Temperature readings in Demuth reach their annual highs in December, averaging 43.3°F (6.3°C) and a minimum average of 27.9°F (-2.3°C).

How cold is December in Demuth?

During December, Demuth experiences an average high-temperature of 43.3°F (6.3°C) and a low-temperature of 27.9°F (-2.3°C). In August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is computed to be 86°F (30°C).

What is the average humidity in December in Demuth?

The average relative humidity in December in Demuth is 76%.

How many days does it rain in December in Demuth?

In December, in Demuth, California, the rain falls for 12.5 days. Throughout December, 4.21" (107mm) of precipitation is accumulated.

How many days does it snow in December in Demuth?

In Demuth, in December, snow falls for 7.5 days, with typically accumulated 8.11" (206mm) of snow.

What is the month with the shortest days in Demuth?

With an average of 9h and 12min of daylight, December has the shortest days of the year.

What is the average length of the day in December in Demuth?

In Demuth, the average day length in December is 9h and 15min.

What time are sunrise and sunset in December in Demuth?

On the first day of December, sunrise is at 7:12 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 4:45 pm PST.

What is the month with the least sunshine in Demuth?

December has the least sunshine of the year, with an average of 5.7h of sunshine.

How long on average sun shines in December in Demuth?

In December, the average sunshine duration in Demuth, California, is 5.7h.

What are the months with the lowest UV index in Demuth?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Demuth.

What is the UV index reading in December in Demuth?

In Demuth, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a low health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Demuth, CA

Average temperature in December - Demuth, CA
  • Average high temperature in December: 43.3°F

The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is December (43.3°F).

  • Average low temperature in December: 27.9°F

The month with the highest average low temperature is July (53.1°F).
The coldest month (with the lowest average low temperature) is December (27.9°F).

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Average pressure in December
Demuth, CA

Average pressure in December - Demuth, CA
  • Average pressure in December: 30.16"Hg

The month with the highest atmospheric pressure is January (30.18"Hg).
The months with the lowest atmospheric pressure are June and August (29.92"Hg).

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Average wind speed in December
Demuth, CA

Average wind speed in December - Demuth, CA
  • Average wind speed in December: 5.1mph

The windiest month (with the highest average wind speed) is March (5.8mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).

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Average humidity in December
Demuth, CA

Average humidity in December - Demuth, CA
  • Average humidity in December: 76%

The months with the highest relative humidity are January and March (79%).
The months with the lowest relative humidity are July and August (40%).

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Average rainfall in December
Demuth, CA

Average rainfall in December - Demuth, CA
  • Average rainfall in December: 4.21"

The wettest month (with the highest rainfall) is March (4.45").
The driest month (with the least rainfall) is July (0.16").

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Average rainfall days in December
Demuth, CA

Average rainfall days in December - Demuth, CA
  • Average rainfall days in December: 12.5 days

The month with the highest number of rainy days is April (14.5 days).
The month with the least rainy days is August (2.3 days).

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Average snowfall in December
Demuth, CA

Average snowfall in December - Demuth, CA
  • Average snowfall in December: 8.11"

The month with the highest snowfall is March (10.43").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Demuth, CA

Average snowfall days in December - Demuth, CA
  • Average snowfall days in December: 7.5 days

The month with the highest number of snowfall days is March (8 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight in December /
Average sunshine in December
Demuth, CA

Average daylight in December / Average sunshine in December - Demuth, CA
  • Average daylight in December: 9h and 1min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in December: 5h and 4min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

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Average sunshine days in December
Demuth, CA

Average sunshine days in December - Demuth, CA
  • Average sunshine days in December: 14.7 days

The month with the most sunshine days is August (26 days).
The month with the least sunshine days is March (11.3 days).

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Average UV index in December
Demuth, CA

Average UV index in December - Demuth, CA
  • Average UV index in December: 2

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in December
Demuth, CA

Average cloud cover in December - Demuth, CA
  • Average cloud cover in December: 38

The month with the most cloud cover is March (Cloud cover 42).
The months with the least cloud cover are July and August (Cloud cover 6).

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Average visibility in December
Demuth, CA

Average visibility in December - Demuth, CA
  • Average visibility in December: 5mi

The months with the highest visibility are February, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, March and December (5mi).

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Demuth, California, USA

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